Door-spring check.



w. 1. ADAMSON DOOR SPRING CHECK.-

APPLICATION FILED NOV- 30 1915.

1,183,512. Patented May16,19 16.

2 SHEETS-SHEET I.

W L. Ada/7716020,

witnesses W. L. ADAMSON.

DOOR SPRING CHECK. APPLICATION ElLED NOV. 30, 1915.

1 c, 1 83,5 1 Patented May 16, 1916 2 SHEETS-SHEET 2.

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WILLIAM LEVI AD-A1VISON, OF REED, OKLAHOMA.

DOOR-SPRING CHECK.

Specification of Letters Patent.

Patented May 16, 1916.

Application filed November 30, 1915. Seria1No. 64,325.

To all whom it may concern:

Be it known that I, WILLIAM L. ADAMson, a citizen of the United States, residing at Reed, in the county of Greer and State of Oklahoma, have invented new and useful Improvements in Door-Spring Checks, of which the following is a specification.

This invention relates to door spring checks of that general class or typein which is embodied a spring for closing a door and a check device whereby the force of the spring, when partly expended, will be resisted to cause the final closing of the door to be accomplished without slamming, the check device consisting of a piston'operating in a cylinder which is filledwith oil, said piston having a valve adapted to open when the piston is actuated by the opening movement of the door, and means for permitting the rapid passage of the oil during the first part and the slow passage of the oil during the latter part of the return movement of the piston.

The present invention has for its object to embody the spring and door check device in the construction of a hinge which may be of light construction so as to make the same especially applicable for use in connection with screen doors and. other light doors.

A further object of the invention is to simplify and improve the construction of a hinge, a portion of which constitutes a housing for a cylinder containing the door closing spring and the piston which constitutes the checking device.

A further object of the invention is to simplify and improve the hinge construction whereby one portion of the hinge forms a housing for the cylinder and another portion of the hinge serves to actuate the piston which constitutes the check device and which also serves to compress the spring.

With these and other ends in view which will readily appear as the nature of the in vention is better understood, the same consists in the improved construction and novel arrangement and combination of parts which will be hereinafter fully described and particularly pointed out in the claim.

In the accompanying drawings has been illustrated a simple and preferred form of the invention, it being, however, understood that no limitation. is necessarily made to the precise structural details therein exhibited, but that changes, alterations and modifications within the scope of the claim may be resorted to when desired.

In the drawings,Figure 1' is a front view of the device constructed in accordance with the invention, together with a portion of a door and door casing on which the device is mounted in position for operat1on. Fig. 2 is a rear view, showing the device detached from the door and easing. Flg. 3 is a top plan view. Fig. 4: is a longitudinal sectional view taken on the line H in Fig. 1. Fig. 5 is a transverse sectional view taken on the line 55 in Fig. 1. Fig. 6 is a transverse sectional view taken through the yoke whereby the piston is operated on the line 6-6 in Fig. 1. Fig. 7 is a perspective detail View of the piston with parts broken away.

Corresponding parts in the several figures are denoted by like characters of reference.

The hinge of the improved device is composed of the parts A and B which constitute the leaves of the hinge. The part or member A consists of an elongated transversely curved shell or housing 15 provided with laterally extending flanges 16 having apertures 17 for the passage of screws or fastening members 18 whereby it may be mounted in position on a door or casing. The shell 15 is provided at the ends thereof with lugs 19 which are turned or bent in ward with respect to the shell. The shell is provided at one end thereof with lengthwise extending cars 20 for the passage of pivot members 21, whereby the member A is connected with the member B. The lat ter consists of a strap 22 having apertures 23 for the passage of fastening members, such as screws 2 1, whereby it may be secured in position for operation. Said strap is provided at one end with upturned cars 25 iaving apertures for the passage of the pivot members 21, said ears being of such dimensions that they may be utilized as cranks or levers in a manner which will be presently described.

C designates a cylinder which is made of proper dimensions to fit in the shell or housing 15 where it is confined against endwise movement by the lugs 19. Said cylinder is provided at its inner end, which is located near the pivotally connected ends of the hinge members A and B, with a head or closure 26. The outer end of the cylinder is provided with two independent heads or closures 27, 28 which are threaded into the end of the cylinder and one of which has a recess 29 for the reception of packing material 30 which is pressed in said recess around the piston stem 31 by means of the outermost head member 27. Each of the head members 27 and 28 is provided with recesses 32 to enable said head members to be adjusted and manipulated by means of an ordinary spanner. The piston rod 31 which is guided through the "heads 27, 28 carries the piston 33 which is provided with a port or passage 34: obstructed by a valve 35 which may consist simply of a Hat spring which is secured on the piston by means of a rivet or fastening member 36. A strong coiled spring 37 is placed in the cylinder between the piston 33 and the head member 28 so that said spring will be compressed or tensioned by outward movement of the piston in the cylinder, said outward movement also permitting the opening of the valve 35 so that oil or other fluid contained in the cylinder may pass through the port of the piston. A bore 38 which extends through the piston and through a portion of the stem communicates through a port 39 in one side of the stem with that portion of the interior of the cylinder which lies between the piston and the head 28. Fixed centrally upon the cylinder head 26 and extending axially within the cylinder is a stem 40 which projects within the bore 38 and which is adapted to form a partial closure for the port 39 when the piston 33 approaches the inner end of the cylinder in which direction it is normally forced by the expansive action of the spring 37.

Pivotally connected with the ears 25 are links or rods 41, between the ends of which is pivotally supported a cross bar 12 having a threaded aperture 43 with which the end of the piston stem 31 is engaged, the parts of the device being properly proportioned and assembled so that by the action of the hinge in opening a door on the casing of which said hinge is mounted, the piston will be pulled outward in the cylinder against the tension of the spring 37, permitting the oil or liquid contained in the cylinder to pass through the port of the piston. When the opening movement of the door is discontinued and the door is released the expansive action of the spring will force the piston inwardly in the cylinder. During the first portion of such inward movement the liquid contents of the cylinder will pass through the bore 38 and the port 39 which is unobstructed, thus permitting the first part of the door closing movement to be quickly effected. As the piston approaches the inner end of the cylinder, however, the pin or stem 40 will engage the bore 38 and Gopies or this patent may be obtained for five cents each, by addressing the will gradually obstruct the port 39, it being 'understood that said pin will not form a complete butonly a partial obstruction to limit and obstruct the flow of the liquid through the port 39, thus causing the latter part of the closing movement of the door to be accomplished softly and without slamming.

The hinge construction is such that the hinge member A will form a housing for the cvlinder G, the latter lying between said housing and the face of the door or casing to which it is applied, lengthwise movement of the cylinder in any direction being obstructed by the lugs 19 at the ends of the shell or housing.

The cylinder has been shown as being provided with a filling opening obstructed by a threaded plug 441, and the shell or housing has openings 15 through one of which the said plug is accessible. Two openings 45 are provided, because it is desirable that the plug 44 should be presented in an upward direction, and one of said openings will be presented upwardly whether the hinge be applied to a right hand or to a left hand door. By partly rotating the cylinder about its axis, the plug 44 may be readily exposed in an upward direction whether the device is applied to a right hand or to a left hand door.

Having thus described the invention, what is claimed as new, is

A device of the class described comprising a hinge member consisting of an elongated transversely curved shell or housing provided with laterally extending flanges having apertures for the passage of fastening means, said shell being provided at the ends thereof with lugs that are bent inward with respect to the shell, said shell being also provided at one end thereof with lengthwise extending cars, a second member consisting of a strap having apertures for the passage of fastening members, said strap being provided at one end with upturned ears; pivot members extending through the ears of the two members; a cylinder fitted in the housing of the first mentioned member between the inturned lugs at the ends thereof, a spring actuated piston operating in the cylinder and having a bleed aperture and a valve for the same, a piston stem extending through the end of the cylinder, and a yoke connecting said stem with the lugs of the second mentioned member at a distance from the pivot members engaging said lugs.

In testimony whereof I ailix my signature in presence of two witnesses.

WILLIAM LEVI ADAMSON.

l/Vitnesses 1 BYRON SMITH, Mrs. ANA FRANCIS.

Commissioner 0! Patents,

Washington, D. G. 

